model.options unconditionally overwrote each provider's curated model
list with provider_model_ids() (live /models catalog), so TUI users
saw non-agentic models that classic CLI /model and `hermes model`
filter out via the curated _PROVIDER_MODELS source.
On Nous specifically the live endpoint returns ~380 IDs including
TTS, embeddings, rerankers, and image/video generators — the TUI
picker showed all of them. Classic CLI picker showed the curated
30-model list.
Drop the overwrite. list_authenticated_providers() already populates
provider['models'] with the curated list (same source as classic CLI
at cli.py:4792), sliced to max_models=50. Honor that.
Added regression test that fails if the handler ever re-introduces
a provider_model_ids() call over the curated list.